update usetime only if usebytes increase
[strongswan.git] / src / charon / sa / child_sa.c
1 /*
2 * Copyright (C) 2006-2008 Tobias Brunner
3 * Copyright (C) 2005-2008 Martin Willi
4 * Copyright (C) 2006 Daniel Roethlisberger
5 * Copyright (C) 2005 Jan Hutter
6 * Hochschule fuer Technik Rapperswil
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 * for more details.
17 */
18
19 #define _GNU_SOURCE
20 #include "child_sa.h"
21
22 #include <stdio.h>
23 #include <string.h>
24 #include <time.h>
25
26 #include <daemon.h>
27
28 ENUM(child_sa_state_names, CHILD_CREATED, CHILD_DESTROYING,
29 "CREATED",
30 "ROUTED",
31 "INSTALLING",
32 "INSTALLED",
33 "UPDATING",
34 "REKEYING",
35 "DELETING",
36 "DESTROYING",
37 );
38
39 typedef struct private_child_sa_t private_child_sa_t;
40
41 /**
42 * Private data of a child_sa_t object.
43 */
44 struct private_child_sa_t {
45 /**
46 * Public interface of child_sa_t.
47 */
48 child_sa_t public;
49
50 /**
51 * address of us
52 */
53 host_t *my_addr;
54
55 /**
56 * address of remote
57 */
58 host_t *other_addr;
59
60 /**
61 * our actually used SPI, 0 if unused
62 */
63 u_int32_t my_spi;
64
65 /**
66 * others used SPI, 0 if unused
67 */
68 u_int32_t other_spi;
69
70 /**
71 * our Compression Parameter Index (CPI) used, 0 if unused
72 */
73 u_int16_t my_cpi;
74
75 /**
76 * others Compression Parameter Index (CPI) used, 0 if unused
77 */
78 u_int16_t other_cpi;
79
80 /**
81 * List for local traffic selectors
82 */
83 linked_list_t *my_ts;
84
85 /**
86 * List for remote traffic selectors
87 */
88 linked_list_t *other_ts;
89
90 /**
91 * Protocol used to protect this SA, ESP|AH
92 */
93 protocol_id_t protocol;
94
95 /**
96 * reqid used for this child_sa
97 */
98 u_int32_t reqid;
99
100 /**
101 * absolute time when rekeying is scheduled
102 */
103 time_t rekey_time;
104
105 /**
106 * absolute time when the SA expires
107 */
108 time_t expire_time;
109
110 /**
111 * state of the CHILD_SA
112 */
113 child_sa_state_t state;
114
115 /**
116 * Specifies if UDP encapsulation is enabled (NAT traversal)
117 */
118 bool encap;
119
120 /**
121 * Specifies the IPComp transform used (IPCOMP_NONE if disabled)
122 */
123 ipcomp_transform_t ipcomp;
124
125 /**
126 * mode this SA uses, tunnel/transport
127 */
128 ipsec_mode_t mode;
129
130 /**
131 * selected proposal
132 */
133 proposal_t *proposal;
134
135 /**
136 * config used to create this child
137 */
138 child_cfg_t *config;
139
140 /**
141 * time of last use in seconds (inbound)
142 */
143 u_int32_t my_usetime;
144
145 /**
146 * time of last use in seconds (outbound)
147 */
148 u_int32_t other_usetime;
149
150 /**
151 * last number of inbound bytes
152 */
153 u_int64_t my_usebytes;
154
155 /**
156 * last number of outbound bytes
157 */
158 u_int64_t other_usebytes;
159 };
160
161 /**
162 * Implementation of child_sa_t.get_name
163 */
164 static char *get_name(private_child_sa_t *this)
165 {
166 return this->config->get_name(this->config);
167 }
168
169 /**
170 * Implements child_sa_t.get_reqid
171 */
172 static u_int32_t get_reqid(private_child_sa_t *this)
173 {
174 return this->reqid;
175 }
176
177 /**
178 * Implements child_sa_t.get_config
179 */
180 static child_cfg_t* get_config(private_child_sa_t *this)
181 {
182 return this->config;
183 }
184
185 /**
186 * Implements child_sa_t.set_state
187 */
188 static void set_state(private_child_sa_t *this, child_sa_state_t state)
189 {
190 charon->bus->child_state_change(charon->bus, &this->public, state);
191 this->state = state;
192 }
193
194 /**
195 * Implements child_sa_t.get_state
196 */
197 static child_sa_state_t get_state(private_child_sa_t *this)
198 {
199 return this->state;
200 }
201
202 /**
203 * Implements child_sa_t.get_spi
204 */
205 u_int32_t get_spi(private_child_sa_t *this, bool inbound)
206 {
207 return inbound ? this->my_spi : this->other_spi;
208 }
209
210 /**
211 * Implements child_sa_t.get_cpi
212 */
213 u_int16_t get_cpi(private_child_sa_t *this, bool inbound)
214 {
215 return inbound ? this->my_cpi : this->other_cpi;
216 }
217
218 /**
219 * Implements child_sa_t.get_protocol
220 */
221 protocol_id_t get_protocol(private_child_sa_t *this)
222 {
223 return this->protocol;
224 }
225
226 /**
227 * Implementation of child_sa_t.set_protocol
228 */
229 static void set_protocol(private_child_sa_t *this, protocol_id_t protocol)
230 {
231 this->protocol = protocol;
232 }
233
234 /**
235 * Implementation of child_sa_t.get_mode
236 */
237 static ipsec_mode_t get_mode(private_child_sa_t *this)
238 {
239 return this->mode;
240 }
241
242 /**
243 * Implementation of child_sa_t.set_mode
244 */
245 static void set_mode(private_child_sa_t *this, ipsec_mode_t mode)
246 {
247 this->mode = mode;
248 }
249
250 /**
251 * Implementation of child_sa_t.has_encap
252 */
253 static bool has_encap(private_child_sa_t *this)
254 {
255 return this->encap;
256 }
257
258 /**
259 * Implementation of child_sa_t.get_ipcomp
260 */
261 static ipcomp_transform_t get_ipcomp(private_child_sa_t *this)
262 {
263 return this->ipcomp;
264 }
265
266 /**
267 * Implementation of child_sa_t.set_ipcomp.
268 */
269 static void set_ipcomp(private_child_sa_t *this, ipcomp_transform_t ipcomp)
270 {
271 this->ipcomp = ipcomp;
272 }
273
274 /**
275 * Implementation of child_sa_t.get_proposal
276 */
277 static proposal_t* get_proposal(private_child_sa_t *this)
278 {
279 return this->proposal;
280 }
281
282 /**
283 * Implementation of child_sa_t.set_proposal
284 */
285 static void set_proposal(private_child_sa_t *this, proposal_t *proposal)
286 {
287 this->proposal = proposal->clone(proposal);
288 }
289
290 /**
291 * Implementation of child_sa_t.get_traffic_selectors.
292 */
293 static linked_list_t *get_traffic_selectors(private_child_sa_t *this, bool local)
294 {
295 return local ? this->my_ts : this->other_ts;
296 }
297
298 typedef struct policy_enumerator_t policy_enumerator_t;
299
300 /**
301 * Private policy enumerator
302 */
303 struct policy_enumerator_t {
304 /** implements enumerator_t */
305 enumerator_t public;
306 /** enumerator over own TS */
307 enumerator_t *mine;
308 /** enumerator over others TS */
309 enumerator_t *other;
310 /** list of others TS, to recreate enumerator */
311 linked_list_t *list;
312 /** currently enumerating TS for "me" side */
313 traffic_selector_t *ts;
314 };
315
316 /**
317 * enumerator function of create_policy_enumerator()
318 */
319 static bool policy_enumerate(policy_enumerator_t *this,
320 traffic_selector_t **my_out, traffic_selector_t **other_out)
321 {
322 traffic_selector_t *other_ts;
323
324 while (this->ts || this->mine->enumerate(this->mine, &this->ts))
325 {
326 if (!this->other->enumerate(this->other, &other_ts))
327 { /* end of others list, restart with new of mine */
328 this->other->destroy(this->other);
329 this->other = this->list->create_enumerator(this->list);
330 this->ts = NULL;
331 continue;
332 }
333 if (this->ts->get_type(this->ts) != other_ts->get_type(other_ts))
334 { /* family mismatch */
335 continue;
336 }
337 if (this->ts->get_protocol(this->ts) &&
338 other_ts->get_protocol(other_ts) &&
339 this->ts->get_protocol(this->ts) != other_ts->get_protocol(other_ts))
340 { /* protocol mismatch */
341 continue;
342 }
343 *my_out = this->ts;
344 *other_out = other_ts;
345 return TRUE;
346 }
347 return FALSE;
348 }
349
350 /**
351 * destroy function of create_policy_enumerator()
352 */
353 static void policy_destroy(policy_enumerator_t *this)
354 {
355 this->mine->destroy(this->mine);
356 this->other->destroy(this->other);
357 free(this);
358 }
359
360 /**
361 * Implementation of child_sa_t.create_policy_enumerator
362 */
363 static enumerator_t* create_policy_enumerator(private_child_sa_t *this)
364 {
365 policy_enumerator_t *e = malloc_thing(policy_enumerator_t);
366
367 e->public.enumerate = (void*)policy_enumerate;
368 e->public.destroy = (void*)policy_destroy;
369 e->mine = this->my_ts->create_enumerator(this->my_ts);
370 e->other = this->other_ts->create_enumerator(this->other_ts);
371 e->list = this->other_ts;
372 e->ts = NULL;
373
374 return &e->public;
375 }
376
377 /**
378 * Implementation of child_sa_t.get_usetime
379 */
380 static u_int32_t get_usetime(private_child_sa_t *this, bool inbound, bool update)
381 {
382 enumerator_t *enumerator;
383 traffic_selector_t *my_ts, *other_ts;
384 u_int32_t last_use = 0;
385
386 if (!update)
387 {
388 return (inbound) ? this->my_usetime : this->other_usetime;
389 }
390
391 enumerator = create_policy_enumerator(this);
392 while (enumerator->enumerate(enumerator, &my_ts, &other_ts))
393 {
394 u_int32_t in, out, fwd;
395
396 if (inbound)
397 {
398 if (charon->kernel_interface->query_policy(charon->kernel_interface,
399 other_ts, my_ts, POLICY_IN, &in) == SUCCESS)
400 {
401 last_use = max(last_use, in);
402 }
403 if (this->mode != MODE_TRANSPORT)
404 {
405 if (charon->kernel_interface->query_policy(charon->kernel_interface,
406 other_ts, my_ts, POLICY_FWD, &fwd) == SUCCESS)
407 {
408 last_use = max(last_use, fwd);
409 }
410 }
411 }
412 else
413 {
414 if (charon->kernel_interface->query_policy(charon->kernel_interface,
415 my_ts, other_ts, POLICY_OUT, &out) == SUCCESS)
416 {
417 last_use = max(last_use, out);
418 }
419 }
420 }
421 enumerator->destroy(enumerator);
422 if (inbound)
423 {
424 this->my_usetime = last_use;
425 }
426 else
427 {
428 this->other_usetime = last_use;
429 }
430 return last_use;
431 }
432
433 /**
434 * Implementation of child_sa_t.get_usebytes
435 */
436 static u_int64_t get_usebytes(private_child_sa_t *this, bool inbound, bool *change)
437 {
438 status_t status;
439 u_int64_t bytes;
440
441 *change = FALSE;
442 if (inbound)
443 {
444 if (this->my_spi)
445 {
446 status = charon->kernel_interface->query_sa(charon->kernel_interface,
447 this->other_addr, this->my_addr,
448 this->my_spi, this->protocol, &bytes);
449 if (status == SUCCESS && bytes > this->my_usebytes)
450 {
451 *change = TRUE;
452 this->my_usebytes = bytes;
453 return bytes;
454 }
455 }
456 return this->my_usebytes;
457 }
458 else
459 {
460 if (this->other_spi)
461 {
462 status = charon->kernel_interface->query_sa(charon->kernel_interface,
463 this->my_addr, this->other_addr,
464 this->other_spi, this->protocol, &bytes);
465 if (status == SUCCESS && bytes > this->other_usebytes)
466 {
467 *change = TRUE;
468 this->other_usebytes = bytes;
469 return bytes;
470 }
471 }
472 return this->other_usebytes;
473 }
474 }
475
476 /**
477 * Implementation of child_sa_t.get_lifetime
478 */
479 static u_int32_t get_lifetime(private_child_sa_t *this, bool hard)
480 {
481 return hard ? this->expire_time : this->rekey_time;
482 }
483
484 /**
485 * Implementation of child_sa_t.alloc_spi
486 */
487 static u_int32_t alloc_spi(private_child_sa_t *this, protocol_id_t protocol)
488 {
489 if (charon->kernel_interface->get_spi(charon->kernel_interface,
490 this->other_addr, this->my_addr, protocol,
491 this->reqid, &this->my_spi) == SUCCESS)
492 {
493 return this->my_spi;
494 }
495 return 0;
496 }
497
498 /**
499 * Implementation of child_sa_t.alloc_cpi
500 */
501 static u_int16_t alloc_cpi(private_child_sa_t *this)
502 {
503 if (charon->kernel_interface->get_cpi(charon->kernel_interface,
504 this->other_addr, this->my_addr, this->reqid,
505 &this->my_cpi) == SUCCESS)
506 {
507 return this->my_cpi;
508 }
509 return 0;
510 }
511
512 /**
513 * Implementation of child_sa_t.install
514 */
515 static status_t install(private_child_sa_t *this, chunk_t encr, chunk_t integ,
516 u_int32_t spi, u_int16_t cpi, bool inbound)
517 {
518 u_int16_t enc_alg = ENCR_UNDEFINED, int_alg = AUTH_UNDEFINED, size;
519 u_int32_t soft, hard, now;
520 host_t *src, *dst;
521 status_t status;
522 bool update = FALSE;
523
524 /* now we have to decide which spi to use. Use self allocated, if "in",
525 * or the one in the proposal, if not "in" (others). Additionally,
526 * source and dest host switch depending on the role */
527 if (inbound)
528 {
529 dst = this->my_addr;
530 src = this->other_addr;
531 if (this->my_spi == spi)
532 { /* alloc_spi has been called, do an SA update */
533 update = TRUE;
534 }
535 this->my_spi = spi;
536 this->my_cpi = cpi;
537 }
538 else
539 {
540 src = this->my_addr;
541 dst = this->other_addr;
542 this->other_spi = spi;
543 this->other_cpi = cpi;
544 }
545
546 DBG2(DBG_CHD, "adding %s %N SA", inbound ? "inbound" : "outbound",
547 protocol_id_names, this->protocol);
548
549 /* send SA down to the kernel */
550 DBG2(DBG_CHD, " SPI 0x%.8x, src %H dst %H", ntohl(spi), src, dst);
551
552 this->proposal->get_algorithm(this->proposal, ENCRYPTION_ALGORITHM,
553 &enc_alg, &size);
554 this->proposal->get_algorithm(this->proposal, INTEGRITY_ALGORITHM,
555 &int_alg, &size);
556
557 soft = this->config->get_lifetime(this->config, TRUE);
558 hard = this->config->get_lifetime(this->config, FALSE);
559
560 status = charon->kernel_interface->add_sa(charon->kernel_interface,
561 src, dst, spi, this->protocol, this->reqid,
562 inbound ? soft : 0, hard, enc_alg, encr, int_alg, integ,
563 this->mode, this->ipcomp, cpi, this->encap, update);
564
565 now = time(NULL);
566 if (soft)
567 {
568 this->rekey_time = now + soft;
569 }
570 if (hard)
571 {
572 this->expire_time = now + hard;
573 }
574 return status;
575 }
576
577 /**
578 * Implementation of child_sa_t.add_policies
579 */
580 static status_t add_policies(private_child_sa_t *this,
581 linked_list_t *my_ts_list, linked_list_t *other_ts_list)
582 {
583 enumerator_t *enumerator;
584 traffic_selector_t *my_ts, *other_ts;
585 status_t status = SUCCESS;
586 bool routed = (this->state == CHILD_CREATED);
587
588 /* apply traffic selectors */
589 enumerator = my_ts_list->create_enumerator(my_ts_list);
590 while (enumerator->enumerate(enumerator, &my_ts))
591 {
592 this->my_ts->insert_last(this->my_ts, my_ts->clone(my_ts));
593 }
594 enumerator->destroy(enumerator);
595 enumerator = other_ts_list->create_enumerator(other_ts_list);
596 while (enumerator->enumerate(enumerator, &other_ts))
597 {
598 this->other_ts->insert_last(this->other_ts, other_ts->clone(other_ts));
599 }
600 enumerator->destroy(enumerator);
601
602 if (this->config->install_policy(this->config))
603 {
604 /* enumerate pairs of traffic selectors */
605 enumerator = create_policy_enumerator(this);
606 while (enumerator->enumerate(enumerator, &my_ts, &other_ts))
607 {
608 /* install 3 policies: out, in and forward */
609 status |= charon->kernel_interface->add_policy(charon->kernel_interface,
610 this->my_addr, this->other_addr, my_ts, other_ts, POLICY_OUT,
611 this->other_spi, this->protocol, this->reqid, this->mode,
612 this->ipcomp, this->other_cpi, routed);
613
614 status |= charon->kernel_interface->add_policy(charon->kernel_interface,
615 this->other_addr, this->my_addr, other_ts, my_ts, POLICY_IN,
616 this->my_spi, this->protocol, this->reqid, this->mode,
617 this->ipcomp, this->my_cpi, routed);
618 if (this->mode != MODE_TRANSPORT)
619 {
620 status |= charon->kernel_interface->add_policy(charon->kernel_interface,
621 this->other_addr, this->my_addr, other_ts, my_ts, POLICY_FWD,
622 this->my_spi, this->protocol, this->reqid, this->mode,
623 this->ipcomp, this->my_cpi, routed);
624 }
625
626 if (status != SUCCESS)
627 {
628 break;
629 }
630 }
631 enumerator->destroy(enumerator);
632 }
633
634 if (status == SUCCESS && this->state == CHILD_CREATED)
635 { /* switch to routed state if no SAD entry set up */
636 set_state(this, CHILD_ROUTED);
637 }
638 return status;
639 }
640
641 /**
642 * Implementation of child_sa_t.update.
643 */
644 static status_t update(private_child_sa_t *this, host_t *me, host_t *other,
645 host_t *vip, bool encap)
646 {
647 child_sa_state_t old;
648 bool transport_proxy_mode;
649
650 /* anything changed at all? */
651 if (me->equals(me, this->my_addr) &&
652 other->equals(other, this->other_addr) && this->encap == encap)
653 {
654 return SUCCESS;
655 }
656
657 old = this->state;
658 set_state(this, CHILD_UPDATING);
659 transport_proxy_mode = this->config->use_proxy_mode(this->config) &&
660 this->mode == MODE_TRANSPORT;
661
662 if (!transport_proxy_mode)
663 {
664 /* update our (initator) SA */
665 if (this->my_spi)
666 {
667 if (charon->kernel_interface->update_sa(charon->kernel_interface,
668 this->my_spi, this->protocol,
669 this->ipcomp != IPCOMP_NONE ? this->my_cpi : 0,
670 this->other_addr, this->my_addr, other, me,
671 this->encap, encap) == NOT_SUPPORTED)
672 {
673 return NOT_SUPPORTED;
674 }
675 }
676
677 /* update his (responder) SA */
678 if (this->other_spi)
679 {
680 if (charon->kernel_interface->update_sa(charon->kernel_interface,
681 this->other_spi, this->protocol,
682 this->ipcomp != IPCOMP_NONE ? this->other_cpi : 0,
683 this->my_addr, this->other_addr, me, other,
684 this->encap, encap) == NOT_SUPPORTED)
685 {
686 return NOT_SUPPORTED;
687 }
688 }
689 }
690
691 if (this->config->install_policy(this->config))
692 {
693 /* update policies */
694 if (!me->ip_equals(me, this->my_addr) ||
695 !other->ip_equals(other, this->other_addr))
696 {
697 enumerator_t *enumerator;
698 traffic_selector_t *my_ts, *other_ts;
699
700 /* always use high priorities, as hosts getting updated are INSTALLED */
701 enumerator = create_policy_enumerator(this);
702 while (enumerator->enumerate(enumerator, &my_ts, &other_ts))
703 {
704 /* remove old policies first */
705 charon->kernel_interface->del_policy(charon->kernel_interface,
706 my_ts, other_ts, POLICY_OUT, FALSE);
707 charon->kernel_interface->del_policy(charon->kernel_interface,
708 other_ts, my_ts, POLICY_IN, FALSE);
709 if (this->mode != MODE_TRANSPORT)
710 {
711 charon->kernel_interface->del_policy(charon->kernel_interface,
712 other_ts, my_ts, POLICY_FWD, FALSE);
713 }
714
715 /* check whether we have to update a "dynamic" traffic selector */
716 if (!me->ip_equals(me, this->my_addr) &&
717 my_ts->is_host(my_ts, this->my_addr))
718 {
719 my_ts->set_address(my_ts, me);
720 }
721 if (!other->ip_equals(other, this->other_addr) &&
722 other_ts->is_host(other_ts, this->other_addr))
723 {
724 other_ts->set_address(other_ts, other);
725 }
726
727 /* we reinstall the virtual IP to handle interface roaming
728 * correctly */
729 if (vip)
730 {
731 charon->kernel_interface->del_ip(charon->kernel_interface, vip);
732 charon->kernel_interface->add_ip(charon->kernel_interface, vip, me);
733 }
734
735 /* reinstall updated policies */
736 charon->kernel_interface->add_policy(charon->kernel_interface,
737 me, other, my_ts, other_ts, POLICY_OUT, this->other_spi,
738 this->protocol, this->reqid, this->mode, this->ipcomp,
739 this->other_cpi, FALSE);
740 charon->kernel_interface->add_policy(charon->kernel_interface,
741 other, me, other_ts, my_ts, POLICY_IN, this->my_spi,
742 this->protocol, this->reqid, this->mode, this->ipcomp,
743 this->my_cpi, FALSE);
744 if (this->mode != MODE_TRANSPORT)
745 {
746 charon->kernel_interface->add_policy(charon->kernel_interface,
747 other, me, other_ts, my_ts, POLICY_FWD, this->my_spi,
748 this->protocol, this->reqid, this->mode, this->ipcomp,
749 this->my_cpi, FALSE);
750 }
751 }
752 enumerator->destroy(enumerator);
753 }
754 }
755
756 if (!transport_proxy_mode)
757 {
758 /* apply hosts */
759 if (!me->equals(me, this->my_addr))
760 {
761 this->my_addr->destroy(this->my_addr);
762 this->my_addr = me->clone(me);
763 }
764 if (!other->equals(other, this->other_addr))
765 {
766 this->other_addr->destroy(this->other_addr);
767 this->other_addr = other->clone(other);
768 }
769 }
770
771 this->encap = encap;
772 set_state(this, old);
773
774 return SUCCESS;
775 }
776
777 /**
778 * Implementation of child_sa_t.destroy.
779 */
780 static void destroy(private_child_sa_t *this)
781 {
782 enumerator_t *enumerator;
783 traffic_selector_t *my_ts, *other_ts;
784 bool unrouted = (this->state == CHILD_ROUTED);
785
786 set_state(this, CHILD_DESTROYING);
787
788 /* delete SAs in the kernel, if they are set up */
789 if (this->my_spi)
790 {
791 charon->kernel_interface->del_sa(charon->kernel_interface,
792 this->other_addr, this->my_addr, this->my_spi,
793 this->protocol, this->my_cpi);
794 }
795 if (this->other_spi)
796 {
797 charon->kernel_interface->del_sa(charon->kernel_interface,
798 this->my_addr, this->other_addr, this->other_spi,
799 this->protocol, this->other_cpi);
800 }
801
802 if (this->config->install_policy(this->config))
803 {
804 /* delete all policies in the kernel */
805 enumerator = create_policy_enumerator(this);
806 while (enumerator->enumerate(enumerator, &my_ts, &other_ts))
807 {
808 charon->kernel_interface->del_policy(charon->kernel_interface,
809 my_ts, other_ts, POLICY_OUT, unrouted);
810 charon->kernel_interface->del_policy(charon->kernel_interface,
811 other_ts, my_ts, POLICY_IN, unrouted);
812 if (this->mode != MODE_TRANSPORT)
813 {
814 charon->kernel_interface->del_policy(charon->kernel_interface,
815 other_ts, my_ts, POLICY_FWD, unrouted);
816 }
817 }
818 enumerator->destroy(enumerator);
819 }
820
821 this->my_ts->destroy_offset(this->my_ts, offsetof(traffic_selector_t, destroy));
822 this->other_ts->destroy_offset(this->other_ts, offsetof(traffic_selector_t, destroy));
823 this->my_addr->destroy(this->my_addr);
824 this->other_addr->destroy(this->other_addr);
825 DESTROY_IF(this->proposal);
826 this->config->destroy(this->config);
827 free(this);
828 }
829
830 /*
831 * Described in header.
832 */
833 child_sa_t * child_sa_create(host_t *me, host_t* other,
834 child_cfg_t *config, u_int32_t rekey, bool encap)
835 {
836 static u_int32_t reqid = 0;
837 private_child_sa_t *this = malloc_thing(private_child_sa_t);
838
839 /* public functions */
840 this->public.get_name = (char*(*)(child_sa_t*))get_name;
841 this->public.get_reqid = (u_int32_t(*)(child_sa_t*))get_reqid;
842 this->public.get_config = (child_cfg_t*(*)(child_sa_t*))get_config;
843 this->public.get_state = (child_sa_state_t(*)(child_sa_t*))get_state;
844 this->public.set_state = (void(*)(child_sa_t*,child_sa_state_t))set_state;
845 this->public.get_spi = (u_int32_t(*)(child_sa_t*, bool))get_spi;
846 this->public.get_cpi = (u_int16_t(*)(child_sa_t*, bool))get_cpi;
847 this->public.get_protocol = (protocol_id_t(*)(child_sa_t*))get_protocol;
848 this->public.set_protocol = (void(*)(child_sa_t*, protocol_id_t protocol))set_protocol;
849 this->public.get_mode = (ipsec_mode_t(*)(child_sa_t*))get_mode;
850 this->public.set_mode = (void(*)(child_sa_t*, ipsec_mode_t mode))set_mode;
851 this->public.get_proposal = (proposal_t*(*)(child_sa_t*))get_proposal;
852 this->public.set_proposal = (void(*)(child_sa_t*, proposal_t *proposal))set_proposal;
853 this->public.get_lifetime = (u_int32_t(*)(child_sa_t*, bool))get_lifetime;
854 this->public.get_usetime = (u_int32_t(*)(child_sa_t*, bool))get_usetime;
855 this->public.get_usebytes = (u_int64_t(*)(child_sa_t*, bool, bool*))get_usebytes;
856 this->public.has_encap = (bool(*)(child_sa_t*))has_encap;
857 this->public.get_ipcomp = (ipcomp_transform_t(*)(child_sa_t*))get_ipcomp;
858 this->public.set_ipcomp = (void(*)(child_sa_t*,ipcomp_transform_t))set_ipcomp;
859 this->public.alloc_spi = (u_int32_t(*)(child_sa_t*, protocol_id_t protocol))alloc_spi;
860 this->public.alloc_cpi = (u_int16_t(*)(child_sa_t*))alloc_cpi;
861 this->public.install = (status_t(*)(child_sa_t*, chunk_t encr, chunk_t integ, u_int32_t spi, u_int16_t cpi, bool inbound))install;
862 this->public.update = (status_t (*)(child_sa_t*,host_t*,host_t*,host_t*,bool))update;
863 this->public.add_policies = (status_t (*)(child_sa_t*, linked_list_t*,linked_list_t*))add_policies;
864 this->public.get_traffic_selectors = (linked_list_t*(*)(child_sa_t*,bool))get_traffic_selectors;
865 this->public.create_policy_enumerator = (enumerator_t*(*)(child_sa_t*))create_policy_enumerator;
866 this->public.destroy = (void(*)(child_sa_t*))destroy;
867
868 /* private data */
869 this->my_addr = me->clone(me);
870 this->other_addr = other->clone(other);
871 this->my_spi = 0;
872 this->other_spi = 0;
873 this->my_cpi = 0;
874 this->other_cpi = 0;
875 this->encap = encap;
876 this->ipcomp = IPCOMP_NONE;
877 this->state = CHILD_CREATED;
878 this->my_usetime = 0;
879 this->other_usetime = 0;
880 this->my_usebytes = 0;
881 this->other_usebytes = 0;
882 /* reuse old reqid if we are rekeying an existing CHILD_SA */
883 this->reqid = rekey ? rekey : ++reqid;
884 this->my_ts = linked_list_create();
885 this->other_ts = linked_list_create();
886 this->protocol = PROTO_NONE;
887 this->mode = MODE_TUNNEL;
888 this->proposal = NULL;
889 this->rekey_time = 0;
890 this->expire_time = 0;
891 this->config = config;
892 config->get_ref(config);
893
894 /* MIPv6 proxy transport mode sets SA endpoints to TS hosts */
895 if (config->get_mode(config) == MODE_TRANSPORT &&
896 config->use_proxy_mode(config))
897 {
898 ts_type_t type;
899 int family;
900 chunk_t addr;
901 host_t *host;
902 enumerator_t *enumerator;
903 linked_list_t *my_ts_list, *other_ts_list;
904 traffic_selector_t *my_ts, *other_ts;
905
906 this->mode = MODE_TRANSPORT;
907
908 my_ts_list = config->get_traffic_selectors(config, TRUE, NULL, me);
909 enumerator = my_ts_list->create_enumerator(my_ts_list);
910 if (enumerator->enumerate(enumerator, &my_ts))
911 {
912 if (my_ts->is_host(my_ts, NULL) &&
913 !my_ts->is_host(my_ts, this->my_addr))
914 {
915 type = my_ts->get_type(my_ts);
916 family = (type == TS_IPV4_ADDR_RANGE) ? AF_INET : AF_INET6;
917 addr = my_ts->get_from_address(my_ts);
918 host = host_create_from_chunk(family, addr, 0);
919 free(addr.ptr);
920 DBG1(DBG_CHD, "my address: %H is a transport mode proxy for %H",
921 this->my_addr, host);
922 this->my_addr->destroy(this->my_addr);
923 this->my_addr = host;
924 }
925 }
926 enumerator->destroy(enumerator);
927 my_ts_list->destroy_offset(my_ts_list, offsetof(traffic_selector_t, destroy));
928
929 other_ts_list = config->get_traffic_selectors(config, FALSE, NULL, other);
930 enumerator = other_ts_list->create_enumerator(other_ts_list);
931 if (enumerator->enumerate(enumerator, &other_ts))
932 {
933 if (other_ts->is_host(other_ts, NULL) &&
934 !other_ts->is_host(other_ts, this->other_addr))
935 {
936 type = other_ts->get_type(other_ts);
937 family = (type == TS_IPV4_ADDR_RANGE) ? AF_INET : AF_INET6;
938 addr = other_ts->get_from_address(other_ts);
939 host = host_create_from_chunk(family, addr, 0);
940 free(addr.ptr);
941 DBG1(DBG_CHD, "other address: %H is a transport mode proxy for %H",
942 this->other_addr, host);
943 this->other_addr->destroy(this->other_addr);
944 this->other_addr = host;
945 }
946 }
947 enumerator->destroy(enumerator);
948 other_ts_list->destroy_offset(other_ts_list, offsetof(traffic_selector_t, destroy));
949 }
950
951 return &this->public;
952 }